Suppose you have the following system to solve:

\[ \begin{cases} 3x + 4y - 5z = -3.5 \\ x - y + z = 1.5 \\ x - 3y + 6z = 16 \end{cases} \]

All the equations must be in the form \(a \cdot x + b \cdot y + c \cdot z = d\).

1. Press , select Algebra > Solve System of Equations > Solve System of Linear Equation.
2. Enter 3 as the number of equations and fill it as follows:

   

3. We have 3 equations and 3 unknowns (\(x\), \(y\), and \(z\)).

   Press . The results should be \(x = 1\), \(y = 4\), and \(z = 4.5\).

Suppose you have to solve the equation \(x^3 - 10x^2 + 33x - 36 = 0\).

The right-hand side must be 0.

1. Press , select Algebra > Polynomial Tools > Find Roots of Polynomial. Set 3 as the order of the equation. Fill the equation as follows:

   

   The order is the biggest power of \(x\) in the equation.

2. Press . The results should be 3 and 4:

   

   \(3\) appears twice because \(x^3 - 10x^2 + 33x - 36 = (x - 3)(x - 3)(x - 4)\).